Physics

Physics, 06.11.2019 16:31, osuigwewhitney487

How many hydrogen atoms are in water, h2o?

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Chemistry, 27.06.2019 13:30, SoccerdudeDylan

Plz final grade before how many water molecules (h₂o) are there in this equation question 1 options: 1 2 4 6 question 2 (1 point) how many total carbon atoms are their in this equation? question 2 options: 1 2 4 6 question 3 (1 point) what does the law of conservation of matter/ mass state? question 3 options: mass cannot be created nor destroyed in a chemical reaction. mass can be created but not destroyed in a chemical reaction. mass can be destroyed but not created during a chemical reaction. mass can be created and destroyed during a chemical reaction. question 4 (1 point) what does conserving mass mean in a chemical equation? question 4 options: there are more of each type of atom on the product side than on the reactant side. there are more of each type of atom on the reactant side than on the product side. there is an equal number of each type of atom on the reactant and product side. there is an unequal number of each type of atom on both sides of the equation. question 5 (1 point) how many grams of hydrogen (h) would need to react with 190 grams of fluorine (f) to make 200 grams of hf (hydrofluoric acid)? question 5 options: 200 20 10 5 question 6 (1 point) is 2h2 + o2 →2h2o a balanced chemical equation? is it obeying the law of conservation of matter? question 6 options: no, the equation is not balanced. the oxygen (o) in the equation has less atoms represented on the products. yes, the equation is balanced. there are the same number of hydrogen (h) and oxygen (o) atoms on both sides of the equation. no, the equation is not balanced. the hydrogen (h) in the equation has less atoms represented on the products. question 7 (1 point) is 2h + o2 →2h2o a balanced chemical equation? is it obeying the law of conservation of matter? question 7 options: no, the equation is not balanced. the oxygen (o) is not balanced, but the hydrogen (h) is. no, the equation is not balanced. neither the hydrogen (h) nor the oxygen (o) are balanced. yes, the equation is balanced. the hydrogen (h) and oxygen (o) atoms are equal on each side of the equation. no, the equation is not balanced. the hydrogen (h) is not balanced, but the oxygen (o) is. question 8 (1 point) the underlined portion of the chemical formula above represents the which tells question 8 options: coefficient; how many hydrogen atoms there are in one molecule coefficient; how many water molecules there are subscript; how many water molecules there are subscript; how many hydrogen atoms there are in one molecule question 9 (1 point) the blue underlined part of the chemical formula above represents a(n) question 9 options: molecule coefficient subscript equation question 10 (1 point) what is the number in a chemical formula that tells the number of specific atoms in the molecule? question 10 options: coefficient molecule subscript formula

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Biology, 17.09.2019 03:30, clinton1790

Question 1 all living organisms contain carbon atoms. which of the following is an important characteristic of carbon? question 1 options: carbon atoms are highly reactive and form unstable bonds with any available atom. carbon atoms can bond with any other atom, but they cannot form bonds with other carbon atoms carbon atoms are very stable and do not easily form bonds with other atoms carbon atoms can bond with many other kinds of atoms to form very stable molecules. question 2 any chemical that contains carbon bonded to at least one other atom, usually hydrogen, is known as a question 2 options: carbohydrate fatty acid organic molecule question 3 how many valence electrons are generally needed to fill the outer shell of most atoms? question 3 options: 4 6 8 question 4 the macromolecules in biochemistry are proteins, carbohydrates, lipids and nucleic acids. what main elements do all of have in common? question 4 options: carbon and sulfur carbon and hydrogen oxygen and nitrogen oxygen and phosphorus

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Chemistry, 15.10.2019 22:00, acornelas7128

Question 13 (1 point) water is formed when two hydrogen atoms bond to an oxygen atom. when a substance is made of two or more atoms like this, we call it question 13 options: an element a compound. a mixture. a complex

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Chemistry, 17.10.2019 21:00, BluSeaa

2.2.4 quiz: the periodic table question 3 of 10 2. points how is hydrogen in heavy water different from hydrogen in normal water? a. the hydrogen atoms in heavy water have a neutron in the nucleus, doubling the mass. b. the hydrogen atoms in heavy water have an extra proton in the nucleus. o c. the hydrogen in heavy water is radioactive. o d. the heavy water molecules contain 3 hydrogen atoms instead of

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How many hydrogen atoms are in water, h2o?

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